This plugin is complex usage of JSTree component. in which, one can create a tree object. Each node of the tree is a set of triplets(three editable fields). as standard features of JSTree one can add remove, undo ,redo, move node from one position to other. Most important feature is that one can insert whole tree into other tree. Moreover each tree has three tags(field,category and subcategory) one can add/remove multiple values, and also make complex search queries about it. Please have look at the compoent at http://elgg.enraiser.com/protocol/listall The plugin is actually working at onelaboratory.org